Hi Sean! How will my heart know that it's God talking to me? How will I be able to know that it's His voice?

You won't :)
God doesn't have a blueprint but He has given you His Word. You will know if it is His will if it is aligned in the Word of God.
As to lovelife - you have to ask help from your accountability group, read books about emotions and relationships, discern if the relationship could take you closer to God or farther from Him. Pray. Get wisdom.

Ask me anything